15  #include "zprobe.grpc.pb.h"
    16
    17  #include <agrpc/asio_grpc.hpp>
    18  #include <boost/asio/co_spawn.hpp>
    19  #include <boost/asio/detached.hpp>
    20  #include <boost/asio/signal_set.hpp>
    21  #include <grpcpp/server.h>
    22  #include <grpcpp/server_builder.h>
    23
    24  #include <optional>
    25  #include <thread>
    26  namespace asio = boost::asio;
    27
    28
    29  // begin-snippet: server-side-helloworld
    30  // ---------------------------------------------------
    31  // Server-side hello world which handles exactly one request from the client before shutting down.
    32  // ---------------------------------------------------
    33  // end-snippet
    34  int main(int argc, const char** argv)
    35  {
    36      const auto port = argc >= 2 ? argv[1] : "50051";
    37      const auto host = std::string("0.0.0.0:") + port;
    38
    39      std::unique_ptr<grpc::Server> server;
    40
    41      grpc::ServerBuilder builder;
    42      agrpc::GrpcContext grpc_context{builder.AddCompletionQueue()};
    43      builder.AddListeningPort(host, grpc::InsecureServerCredentials());
    44      zprobe::ProbeService::AsyncService service;
    45      builder.RegisterService(&service);
    46      server = builder.BuildAndStart();
    47
    48      asio::co_spawn(
    49          grpc_context,
    50          [&]() -> asio::awaitable<void>
    51          {
    52              grpc::ServerContext server_context;
    53              helloworld::HelloRequest request;
    54              grpc::ServerAsyncResponseWriter<helloworld::HelloReply> writer{&server_context};
    55              co_await agrpc::request(&helloworld::Greeter::AsyncService::RequestSayHello, service, server_context,
    56                                      request, writer, asio::use_awaitable);
    57              helloworld::HelloReply response;
    58              response.set_message("Hello " + request.name());
    59              co_await agrpc::finish(writer, response, grpc::Status::OK, asio::use_awaitable);
    60          },
    61          asio::detached);
    62
    63      grpc_context.run();
    64
    65      server->Shutdown();
    66  }```

**CMAKE -- Success**
 cmake  .. "-DCMAKE_TOOLCHAIN_FILE=~/tools/vcpkg/scripts/buildsystems/vcpkg.cmake"  "-DCMAKE_PREFIX_PATH=$MY_INSTALL_DIR"

**CMakeLists.txt**
```target_link_libraries(zprobe
  PUBLIC zprobe_grpc_proto
  ${_REFLECTION}
  ${_GRPC_GRPCPP}
  ${_PROTOBUF_LIBPROTOBUF}
  asio-grpc::asio-grpc-standalone-asio)

[ 83%] Building CXX object CMakeFiles/zprobe.dir/grpc_asio_server.cpp.o
/home/bbhushan/work/zprobe/grpc_asio_server.cpp:26:29: error: ‘namespace asio = boost::boost::asio;’ conflicts with a previous declaration
   26 | namespace asio = boost::asio;
      |                             ^
In file included from /home/bbhushan/tools/vcpkg/installed/x64-linux/include/asio/execution/allocator.hpp:19,
                 from /home/bbhushan/tools/vcpkg/installed/x64-linux/include/asio/execution.hpp:18,
                 from /home/bbhushan/tools/vcpkg/installed/x64-linux/include/asio/any_io_executor.hpp:22,
                 from /home/bbhushan/tools/vcpkg/installed/x64-linux/include/agrpc/detail/asio_forward.hpp:24,
                 from /home/bbhushan/tools/vcpkg/installed/x64-linux/include/agrpc/detail/default_completion_token.hpp:18,
                 from /home/bbhushan/tools/vcpkg/installed/x64-linux/include/agrpc/default_completion_token.hpp:19,
                 from /home/bbhushan/tools/vcpkg/installed/x64-linux/include/agrpc/alarm.hpp:18,
                 from /home/bbhushan/tools/vcpkg/installed/x64-linux/include/agrpc/asio_grpc.hpp:33,
                 from /home/bbhushan/work/zprobe/grpc_asio_server.cpp:17:
/home/bbhushan/tools/vcpkg/installed/x64-linux/include/asio/detail/type_traits.hpp:51:11: note: previous declaration ‘namespace asio { }’
   51 | namespace asio {
      |           ^~~~
/home/bbhushan/work/zprobe/grpc_asio_server.cpp: In function ‘int main(int, const char**)’:
/home/bbhushan/work/zprobe/grpc_asio_server.cpp:48:11: error: ‘co_spawn’ is not a member of ‘asio’
   48 |     asio::co_spawn(
      |           ^~~~~~~~
/home/bbhushan/work/zprobe/grpc_asio_server.cpp:50:24: error: ‘awaitable’ in namespace ‘asio’ does not name a template type
   50 |         [&]() -> asio::awaitable<void>
      |                        ^~~~~~~~~
/home/bbhushan/work/zprobe/grpc_asio_server.cpp:50:33: error: expected ‘{’ before ‘<’ token
   50 |         [&]() -> asio::awaitable<void>
      |                                 ^
/home/bbhushan/work/zprobe/grpc_asio_server.cpp:50:34: error: expected primary-expression before ‘void’
   50 |         [&]() -> asio::awaitable<void>
      |                                  ^~~~
/home/bbhushan/work/zprobe/grpc_asio_server.cpp:61:15: error: ‘detached’ is not a member of ‘asio’; did you mean ‘boost::asio::detached’?
   61 |         asio::detached);
      |               ^~~~~~~~
In file included from /home/bbhushan/work/zprobe/grpc_asio_server.cpp:19:
/home/bbhushan/tools/vcpkg/installed/x64-linux/include/boost/asio/detached.hpp:103:22: note: ‘boost::asio::detached’ declared here
  103 | constexpr detached_t detached;
      |                      ^~~~~~~~
make[2]: *** [CMakeFiles/zprobe.dir/build.make:76: CMakeFiles/zprobe.dir/grpc_asio_server.cpp.o] Error 1
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